1#define _GNU_SOURCE
 2
 3#include <stdio.h>
 
 4#include <unistd.h>
 5#include <bpf/libbpf.h>
 
 6
 7int main(int argc, char **argv)
 8{
 9	struct bpf_link *link = NULL;
10	struct bpf_program *prog;
11	struct bpf_object *obj;
12	char filename[256];
13	char command[256];
14	int ret = 0;
15	FILE *f;
16
17	if (!argv[1]) {
18		fprintf(stderr, "ERROR: Run with the btrfs device argument!\n");
19		return 0;
20	}
21
22	snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
23	obj = bpf_object__open_file(filename, NULL);
24	if (libbpf_get_error(obj)) {
25		fprintf(stderr, "ERROR: opening BPF object file failed\n");
26		return 0;
27	}
28
29	prog = bpf_object__find_program_by_name(obj, "bpf_prog1");
30	if (!prog) {
31		fprintf(stderr, "ERROR: finding a prog in obj file failed\n");
32		goto cleanup;
33	}
34
35	/* load BPF program */
36	if (bpf_object__load(obj)) {
37		fprintf(stderr, "ERROR: loading BPF object file failed\n");
38		goto cleanup;
39	}
40
41	link = bpf_program__attach(prog);
42	if (libbpf_get_error(link)) {
43		fprintf(stderr, "ERROR: bpf_program__attach failed\n");
44		link = NULL;
45		goto cleanup;
46	}
47
48	snprintf(command, 256, "mount %s tmpmnt/", argv[1]);
49	f = popen(command, "r");
50	ret = pclose(f);
51
52cleanup:
53	bpf_link__destroy(link);
54	bpf_object__close(obj);
55	return ret ? 0 : 1;
56}

 1#define _GNU_SOURCE
 2
 3#include <stdio.h>
 4#include <linux/bpf.h>
 5#include <unistd.h>
 6#include <bpf/bpf.h>
 7#include "bpf_load.h"
 8
 9int main(int argc, char **argv)
10{
11	FILE *f;
 
 
12	char filename[256];
13	char command[256];
14	int ret;
 
 
 
 
 
 
15
16	snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
17
18	if (load_bpf_file(filename)) {
19		printf("%s", bpf_log_buf);
20		return 1;
 
 
21	}
22
23	snprintf(command, 256, "mount %s tmpmnt/", argv[1]);
24	f = popen(command, "r");
25	ret = pclose(f);
26
 
 
 
27	return ret ? 0 : 1;
28}